Employee Share Ownership Plans - Summary of Fair Value and Assumptions in the Calculation of Fair Value for Awards Issued (Detail) - 12 months ended Jun. 30, 2021
|
USD ($)
yr
$ / shares
|
USD ($)
yr
£ / shares
|
| BHP Group Limited [member] | CDP awards [Member] |
|
|
| Disclosure of terms and conditions of share-based payment arrangement [line items] |
|
|
| Weighted average fair value of awards granted during the year | $ |
$ 25.28
|
$ 25.28
|
| Share price at grant date |
$ 35.90
|
|
| BHP Group Limited [member] | CDP awards [Member] | Bottom of range [member] |
|
|
| Disclosure of terms and conditions of share-based payment arrangement [line items] |
|
|
| Estimated life of awards | yr |
2
|
2
|
| BHP Group Limited [member] | CDP awards [Member] | Top of range [member] |
|
|
| Disclosure of terms and conditions of share-based payment arrangement [line items] |
|
|
| Estimated life of awards | yr |
5
|
5
|
| BHP Group Limited [member] | STIP awards [member] |
|
|
| Disclosure of terms and conditions of share-based payment arrangement [line items] |
|
|
| Weighted average fair value of awards granted during the year | $ |
$ 25.28
|
$ 25.28
|
| Estimated life of awards | yr |
2
|
2
|
| Share price at grant date |
$ 35.90
|
|
| BHP Group Limited [member] | LTIP awards [member] |
|
|
| Disclosure of terms and conditions of share-based payment arrangement [line items] |
|
|
| Weighted average fair value of awards granted during the year | $ |
$ 14.68
|
$ 14.68
|
| Risk-free interest rate |
0.25%
|
0.25%
|
| Estimated life of awards | yr |
5
|
5
|
| Estimated volatility of share price |
28.00%
|
28.00%
|
| BHP Group Limited [member] | LTIP awards [member] | Range One [Member] |
|
|
| Disclosure of terms and conditions of share-based payment arrangement [line items] |
|
|
| Share price at grant date |
$ 35.90
|
|
| BHP Group Limited [member] | LTIP awards [member] | Range Two [Member] |
|
|
| Disclosure of terms and conditions of share-based payment arrangement [line items] |
|
|
| Share price at grant date |
33.81
|
|
| BHP Group Limited [member] | LTIP awards [member] | Range Three [Member] |
|
|
| Disclosure of terms and conditions of share-based payment arrangement [line items] |
|
|
| Share price at grant date |
$ 38.56
|
|
| BHP Group Limited [member] | MAP awards [member] |
|
|
| Disclosure of terms and conditions of share-based payment arrangement [line items] |
|
|
| Weighted average fair value of awards granted during the year | $ |
$ 22.88
|
$ 22.88
|
| Dividend yield |
4.90%
|
4.90%
|
| BHP Group Limited [member] | MAP awards [member] | Bottom of range [member] |
|
|
| Disclosure of terms and conditions of share-based payment arrangement [line items] |
|
|
| Estimated life of awards | yr |
1
|
1
|
| BHP Group Limited [member] | MAP awards [member] | Top of range [member] |
|
|
| Disclosure of terms and conditions of share-based payment arrangement [line items] |
|
|
| Estimated life of awards | yr |
5
|
5
|
| BHP Group Limited [member] | MAP awards [member] | Range One [Member] |
|
|
| Disclosure of terms and conditions of share-based payment arrangement [line items] |
|
|
| Share price at grant date |
$ 38.36
|
|
| BHP Group Limited [member] | MAP awards [member] | Range Two [Member] |
|
|
| Disclosure of terms and conditions of share-based payment arrangement [line items] |
|
|
| Share price at grant date |
36.91
|
|
| BHP Group Limited [member] | MAP awards [member] | Range Three [Member] |
|
|
| Disclosure of terms and conditions of share-based payment arrangement [line items] |
|
|
| Share price at grant date |
35.90
|
|
| BHP Group Limited [member] | MAP awards [member] | Range Four [Member] |
|
|
| Disclosure of terms and conditions of share-based payment arrangement [line items] |
|
|
| Share price at grant date |
$ 45.88
|
|
| BHP Group Limited [member] | Shareplus [member] |
|
|
| Disclosure of terms and conditions of share-based payment arrangement [line items] |
|
|
| Weighted average fair value of awards granted during the year | $ |
$ 24.96
|
$ 24.96
|
| Risk-free interest rate |
0.21%
|
0.21%
|
| Estimated life of awards | yr |
3
|
3
|
| Share price at grant date |
$ 30.19
|
|
| Dividend yield |
5.59%
|
5.59%
|
| BHP Group Limited [member] | Transitional and Commencement KMP awards [Member] |
|
|
| Disclosure of terms and conditions of share-based payment arrangement [line items] |
|
|
| Weighted average fair value of awards granted during the year | $ |
$ 28.35
|
$ 28.35
|
| Estimated life of awards | yr |
2
|
2
|
| Share price at grant date |
$ 38.56
|
|
| BHP Group Plc [member] | MAP awards [member] |
|
|
| Disclosure of terms and conditions of share-based payment arrangement [line items] |
|
|
| Weighted average fair value of awards granted during the year | $ |
$ 18.66
|
$ 18.66
|
| Estimated life of awards | yr |
3
|
3
|
| Share price at grant date | £ / shares |
|
$ 17.13
|
| Dividend yield |
5.70%
|
5.70%
|
| BHP Group Plc [member] | Shareplus [member] |
|
|
| Disclosure of terms and conditions of share-based payment arrangement [line items] |
|
|
| Weighted average fair value of awards granted during the year | $ |
$ 15.32
|
$ 15.32
|
| Risk-free interest rate |
0.12%
|
0.12%
|
| Estimated life of awards | yr |
3
|
3
|
| Share price at grant date | £ / shares |
|
$ 12.11
|
| Dividend yield |
6.40%
|
6.40%
|